The kidney is an internal, bean shaped organ of vertebrates. Kidneys are responsible for secreting urine, regulate the electrolytes of the body and filter the blood.

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How is Hypertonic Urine Produced in a Mammalian Kidney?

I know that the ascending loop of Henle is impermeable to water and ions, and, by end of the ascending limb, the osmolarity of the tubular fluid is very low due to the active transport of ions out ...